Spring-motor escapement.



F. MAGIDSON.

SPRING MOTOR ESCAPEMENT.

APP LICAT|0N FILED JAN. 19. 1916.

Patented Jan; 16, 1917.

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To all whom it may cone era} Be it known that'I, FRANK MAeinsoN, a

citizen of theUnited- States, and resident of Brownsville, in the county of. Fayette and State of Pennsylvania, have invented certain new and useful Improvements in Spring- Motor Escapements, of which the following is a specification. 3 f i f The object of this invention is to provide an improved and highly eilicient-spring motor escapement, whereby the 'motor maybe utilized for actuating. an oscillating o'rother. re-versely'moving body, the arrangement be ing such that the operation of the escapement is stopped and remains quiescent upon stopping. the movement of the oscillating body, but is resumed upon again imparting motion to the body, the momentum of the latter'thus operating to keep the escapement mechanism in motion. i

Figure 1 is; a longitudinal section'of the spring motor {and escapernent mechanism, and Fig. 2 is a top plan 'viewof the same. Fig. 3 illustrates one of the escapement dogs in detail. Fig.4 is a view of the. escapement shown in Fig. 2, being drawn to a. larger scale. Figs. 5 and 6 are sectional elevations taken at right angles to each other, illustrating the -modified application of cheese 'capementmechanism. l

' Referring to the drawings, the spring motor and 'escapement mechanism'are preferably inclosed in a suitably supported casing 7, the motion being transmitted by means of a link 8 to the part to be oscillated, the link being connected to the escapement V mechanism at 9.

The spring element of the motor maybe variously embodied. As here shown, it consists of an elongated coiled spring 10 which is adapted to be wound on spool '11, the lat-1 ter secured to shaft 12 extending" longitudinally throughfcasing 'Zwith the projecting extremities thereof "adapted to removably receive a crank 137whereby the motor may be wound up from either end of thelcasing. As shown inFig. 1, one end of thesprin'g is secured at14' to the spool and its opposite end at 14 to a fixed bracket 15. y

In the adaptation shown in Fig. 1 the ratchet wheel 16 of theescapementmechanism is journaled. on post 17 the.- latter sup.- ported from beneath by bracket 18and from above by bridge 19 which overhangs 1 the ratchet wheel, said bracket andi'bridge being I 'S peciiicaticn 'of Letters 1 mm. 1 P Application'filed January. 19, 1916. Serial N 0. 3,933.,

cradle.

' suitably, secured tojthe' casing A beveled pinion ;20I at'the underside of the ratchet wheel meshes with the larger gear wheel 21 secured to spool 11 and s'haft'12, If this re-.

duction gearing is" not desired the ratchet wheel 16 may be directly connected to shaft 12 as in Figs. 5' and 6, in such'casea. spiderlike frame 22 being arranged transversely Within casing 7 in lieu of bridge 19 for supporting the escapeme-nt levers presently to be described. I V

Projecting from bridge '19 (or from spider 22) are the tWo posts 23 arranged'at diametrically opposite sides of the axial center of ratchet wheel 16, and fulc'rumed and adapted to oscillate on these posts are the two levers 24 and 25 having their adjacent ends jointed together at 26 whereby the free por tions of the levels which extend outward over opposite portionsof the ratchet Wheel are adapted to operate simultaneously. Piv otedto'the under or inner side of lever 24 is dog 27 of bell-crank form and similarly mounted on lever, 25 but inreverse position isthe like dog 28; One arm ofreach dog is shaped to haveratchet engagementwith the teeth of wheel 16 while th'e'other and inwardly extending arm located beneath or back'ofthe lever" is Tnotched; as indicated at 29.. Secured to fulcrum posts 23 is a sub-.

' through aperture 25 thereof and secured to extremity "29 of dog 28; Apertu'res 24 and 25' are materially larger than the spring extending therethrough' and afiord the levers and spring arms're'lative movement in order to'efiectthe escapement, as will be presently described. Lever24 is extended for the pivotal connection 9'with link 8, wherebythe es'capement mechanism is connected to the oscillating body, in 'the'present instance a 1- Operation: mileage 27 and as, 01.6 or the other, operate tor-lockthe ratchet-wheel when the mechanism is quiescent, also when the motoris being wound up, during the winding operation the ratchet wheel slipping freely past the holding dog, as will be tinderstoodl The spring arms'31 and 32 oppose deflection from their fixed normal straight- V to 11 panama as assesses thereof a sulting from the oscillations of levers 2i and 25 operatetomove dogs 27 j and 28 on their pivots either into or out-of engagement with the ratchet Wheel, determined by thedirection each spring arm is deflected? With the escapement mechanism in the positionshoWninFigs'2 and i, the ratchet is held by dog 28, the movementiof lever 25 into the position shown resulting in causing spring arm 32 to swing dog 28 into engagement with the ratchet, and at the same time, the movement of lever24: has caused spring arm 31 to oscillate "the oppositely positioned dog27 in a direction to release itshold ontheratchetwheel. Now with the partsin the positionshown in Fig.2, i-fthe cradle body is started to swinging, the'first effective oscillation will move lever 24 toward the top of Figs; 2-and 4E, and joint26-will result-in similarly moving the free portion of lever 25.. But as dogs 27 andm28 are reversely positioned, the described movement of lever 25 will causespring' arm 32 to turn dog 28 out- 0f engagement withthe ratchet wheel, while the simultaneous movement of lever 24; will, throughthe medium of spring arm 31,

have anloppositeefiect on :dog .27 .7 Hence,

whilelthe hold of. dog 28 is being relaxed and finally. released, dog 27 is being movedbeen stopped It is further characteristic of the inventionthat the spring mechanism imparts positive. impellingmovementto lever 24uduring the vibration in each direction of thelatter, andhencethe partwhic'h isa ctu atedin .the" present. instance the cradle bodyis positively moved inieach direction past the center. -.In this. particular the a invention is distinguished from .a construction wherein 1 the a impelling mechanism may be active during the vibrations in one direction of the actuated body and inactive duringthe vibrations in the opposite direction, in such case what may be termed the inactive vibra tions being accomplished solely by "the momentu m'of theflcradleor other swinging body- "The escapement may'c-ibe directly transmitted as in theadaptati'onrshown in Fig. :6 or through the medium of the reducing 'ge'ar ing rown i1; Fig. 1. Ana while the invention is designed primarily for automatically i -rockingacradle, it may obviously be applied to various other uses.

Iclaim; .i

a lever support, two levers each 'pivoted to the supportruandi"extending, respectively, to-

ward opposite sides of the ratchet wheel, the levers connected'together for simultaneous movement, anddogs carriedby the levers and operated by the latter to alternately engage the wheel teeth for limiting the escapement thereof.

- ,2 In an escapement mechanism, the combinationof a spring-impelled ratchet wheel, a lever support, levers extending across the face 'of'the wheelito opposite sides thereof, thelevers arranged end to end with their adjacent endsrjointed together and with each lever pivoted to the supportadjacent to said joint, and springeactuated dogs pivoted to the levers: and adapte'dto be operated by the oscillations of the levers whereby the ratchet wheel is engaged bysfirst one dog and then the other for afl'ording step by-step escapement, ,v or V ,.j v

a 3. Inv an escapement mechanism, the com bination of a spring-impelled ratchet Wheel, a leversupport, two'levers arranged end to end and extending to iopposite' p'ortions of the wheel, the levers jointed together at their adjacent ends and ieachxfulcrumed to the support adjacent to :saidf'joint, dogs pivoted to the leversfor engagingopposite portions of :the ratchet wheel, andf'a spring for each dog having fixed position with the free portion ofthe' spring connected to its dog, each lever when in one position maintaining its dog :andspring in suchposition that the dog is held in engagement with the ratchetwheel while movement of the lever fromsuch positioncauses the spring to move the dog out of engagement with the ratchet wheel.

4. In an escapement mechanism, the combination .of a spring-impelled. ratchet wheel, a lever support, two leVers-Jfulcrumed to the support and'with the adjacentends .of the leverszconnected t0gether,dogs pivoted to the respective levers for engaging opposite portions of the: ratchet wheel, a spring for each lever, each spring :havingfixed position with the free portionwthereofr. loosely engaged-by the lever'and adapted to .be deflected when theQlever is oscillated, said free portion ofthe spring connected to the pivoted dog and adapted-to turn thelatterinto or out ofengagement vwith the ratchet wheel determined by the direction-of movement of theleveig theirelative movement'of the lever and spring resulting-in: said. turning movement'ofthedogit'ifa p ,r I b 5. In an:escapementfmechanism, the combination of a spring-impelled ratchet Wheel, a lever support, two levers each fulcrumed to the support and with the adjacent ends of the levers connected together, ratchet wheel engaging dogs pivoted to the respective levers, each lever having an aperture adjacent its dog, and a spring for each lever having a fixed support with the free portion of the spring extending through the lever aperture and connected to the pivoted dog, each lever when oscillating adapted to laterally deflect its spring and the movement of the latter within the lever aperture operating to turn the pivoted dog mounted on such lever either into or out of engagement with the ratchet wheel determined by the direction of movement of the lever.

6. In an escapement mechanism, the combination of a spring-impelled ratchet wheel, a lever support, fulcrum posts projecting from the support, two levers fulcrumed, respectively, on the posts with the adjacent ends of the levers connected together and with their free portions extending to opposite portions of the wheel, reversely positioned dogs pivoted, respectively, to the levers, the pivotal movement of each dog nected to and adapted to oscillate the dog" into or out of engagement with the ratchet determined by the direction of movemen of the lever. I

7 In an escapement mechanism, the combination of a spring-impelled ratchet wheel, two levers supported independently of the wheel and extending from the wheel center toward opposite portions thereof, the levers jointed together at their adjacent ends and separately fulcrumed adjacent the joint whereby the free portion of one lever is oscillated in one direction and the corresponding portion of the other lever. is similarly oscillated, reversely positioned dogs movably supported by the respective levers and adapted to engage oppositeportions of the wheel, and means actuated by the movement of each lever for moving the dog connected to such lever either into or out of engage- ?wies of this patent maybe obtained for ment with the wheel determined by the direction of movement of the lever, each dog alternately engaging and disengaging the wheel simultaneously with the disengagement and engagement, other dog. V

8. In an escapement mechanism, the com respectively of the bination of a spring-impelled ratchet wheel,

opposite portions of the ratchet wheel,

means actuated by the movement of each lever for placing the dog carried by such lever either in or out of engagement with the wheel determined by the direction of movement of the lever, and a body adapted for a back and forth movement with a connection between the body and one of the levers, the momentum of the body operating 'to maintain a step-by-step release of the ratchet wheel through the medium of the dog-carrying levers. v

9. In an escapement mechanism, the combination of a spring-impelled ratchet wheel, alever support, two levers each pivoted to the support and extending, respectively, toa ward different portions of the wheel periphery, means connecting the levers whereby" their free portions are adapted to move simultaneously first in one direction and then in the opposite direction, reversely positioned dogs pivoted to the respective levers, v

springs actuated by the movements of the levers for mamtammg one dog in engage-' In testimony whereof I affix my signature V in presence of two witnesses.

- FRANK MAGIDSON.

Witnesses V L. M. BARKER, N. R. BYLAND.

five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

